<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Bulma calc</title>
    <link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bulma/0.7.0/css/bulma.min.css">
    <!-- debug switch -->
    <!-- <link rel="stylesheet" href="css/debug.css"> -->
    <link rel="stylesheet" href="index.css">
    <!-- <link rel="stylesheet" href="debug.css"> -->
</head>

<body>
<div class="calculator">
    <div class="calculator-bar">
        <div class="close is-denger">x</div>
        <div class="minimize">-</div>
        <div class="maximize">+</div>
    </div>

    <div class="calculator-display">0</div>

    <div class="calculator-keys">
        <button type="button" class="operator" value="+">+</button>
        <button type="button" class="operator" value="-">-</button>
        <button type="button" class="operator" value="*">&times;</button>
        <button type="button" class="operator" value="/">&divide;</button>

        <button type="button" value="7">7</button>
        <button type="button" value="8">8</button>
        <button type="button" value="9">9</button>

        <button type="button" value="4">4</button>
        <button type="button" value="5">5</button>
        <button type="button" value="6">6</button>

        <button type="button" value="1">1</button>
        <button type="button" value="2">2</button>
        <button type="button" value="3">3</button>

        <button type="button" value="0">0</button>
        <button type="button" class="decimal" value=".">.</button>
        <button type="button" class="all-clear" value="all-clear">AC</button>

        <button type="button" class="equal-sign" value="=">=</button>

    </div>
</div>
</body>
</html>